I have a 20g reef tank, 6 months old. Test results are as follows:
S.G. = 1.024
Temp = 79 deg F
pH = 8.0
Ammonia = 0
Nitrite = 0
Nitrate = 20
Current problem is that my 2 clownfish have both died within a week. The first disappeared suddenly. 4 days later my other clownfish died as well...I...